root word: limi, meaning 'attention'

limiin
to pay attention to


nililimi
pondering, considering


paglilimi
analysis


masusing paglilimi
detailed analysis



Nililimi ko kung ano ang tamang gawin.
I'm pondering what the right thing to do is.


Pilit nililimi ang lohika ng mga pangyayari.
Trying very hard to analyze the logic of events.




The more common Tagalog word for 'thinking about something' is iniisip.